Let me tell you how secret this prototype is: not only does it not appear in any other games, nobody’s even seen it. The in-game model is carefully camouflaged, as is the vehicle at any and all public appearances. Spy photos of the damned thing are worth $100,000 each.

The prototype is due for official reveal on January 13, 2013. This is the closest you can get till then. Screen and trailer below.